You've read that followers of 811 sometimes have zinc and selenium deficiencies, as in, people following 811 mentioned that they'd experienced such deficiencies? Or did you read from someone trying to discredit 811 that the diet is low in zinc and selenium?I've been following 811 for more than 20 years and haven't experienced such deficiencies, nor do I know of any long-term followers of 811 who have gone deficient in zinc or selenium.I'd give the program a try, if I were you, and rest easy, knowing that even if I went deficient, I could always supplement, or switch back to some other program.